Allen-Bradley 1746-OW4
Allen-Bradley 1746-OW4
Allen-Bradley 1746-OW4
Allen-Bradley 1746-OW4
Allen-Bradley 1746-OW4
Allen-Bradley 1746-OW4
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1746-OW4

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Allen-Bradley 1746-OW4 provides four hard-contact relay outputs for switching supported AC or DC loads from an SLC 500 chassis.
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Technical specifications for 1746-OW4

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1746-OW4
  • Product Family:
    SLC 500
  • Product Type:
    Four-Point AC/DC Relay Output Module
  • Stock:
    1
  • Outputs:
    4 relay outputs; one common
  • Operating Voltage:
    5–265 V AC, 47–63 Hz; 5–125 V DC
  • Backplane Current:
    45 mA at 5 V DC; 45 mA at 24 V DC
  • Signal Delay:
    10 ms maximum on and off
  • Off-State Leakage:
    0 mA
  • Minimum Load Current:
    10 mA at 5 V DC
  • Module/Common Current:
    8 A maximum
  • AC Contact Rating:
    At 240 V: 7.5 A make, 0.75 A break, 2.5 A continuous; at 120 V: 15 A make, 1.5 A break
  • DC Contact Rating:
    At 125 V: 0.22 A make/break, 1 A continuous; at 24 V: 1.2 A make/break, 2 A continuous
  • Weight:
    0.2 kg
  • Tariff Code:
    8538900000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Contact Loading Contact Protection Shared Common Application
  • Four hard-contact relay outputs for supported AC or DC loads
  • Zero off-state leakage for circuits sensitive to solid-state leakage current
  • One shared common with published make, break, and continuous contact ratings

1746-OW4 is an Allen-Bradley four-point ac/dc relay output module for SLC 500 chassis.

The module uses electromechanical contacts to isolate controller logic from a common-powered group of AC or DC field loads.

Before installation or replacement, verify common voltage, contact duty, inrush, minimum load, switching frequency, suppression, wiring-arm terminals, and output-image assignment.

Availability, condition, price, and shipping time for 1746-OW4 are confirmed during quotation.

Allen-Bradley 1746-OW4 Four-Point AC/DC Relay Output Module Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Apply the make, break, and continuous ratings for the actual AC or DC load
  • Include inrush and power factor when sizing contactor or solenoid circuits
  • Keep total common and module current within the published limit
  • Install load-appropriate suppression at inductive devices
  • Avoid suppression arrangements that violate the required machine release time
  • Separate relay load conductors from sensitive analog and communication wiring
  • Treat all four output contacts as one common-powered group
  • Do not mix supplies that cannot legally or electrically share the common
  • Label the wiring arm so source voltage and circuit ownership remain clear
  • AC contactor and relay-coil switching in compact SLC 500 panels
  • DC solenoid and pilot-device control within the published contact ratings
  • Mixed industrial relay-load applications that share one compatible common supply
Description
1746-OW4 is a four-point ac/dc relay output module for the SLC 500 control platform.

The module uses electromechanical contacts to isolate controller logic from a common-powered group of AC or DC field loads.

Before installation or replacement, verify common voltage, contact duty, inrush, minimum load, switching frequency, suppression, wiring-arm terminals, and output-image assignment.
Revisions

Revision Part #

Also known as

1746-OW4 Ser A
1746-OW4/A,Series A,Rev A
Alternative Names
1746-OW4 1746OW4 AB 1746-OW4 Allen-Bradley 1746-OW4 Rockwell Automation 1746-OW4
Technical notes
1746-OW4 has four relay contacts on one common; verify wetting current, inrush, shared-source compatibility, suppression, and contact-life duty before replacement.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Can 1746-OW4 switch both AC and DC devices?
Yes, within the published relay ratings, but all four points share one common. Do not mix circuits whose common, isolation, or safety design is incompatible.
Why is load suppression important with 1746-OW4?
Relay contacts can arc when coils or other inductive loads open. Correct suppression reduces electrical wear, interference, and nuisance controller behavior.
How should 1746-OW4 contact life be estimated?
Use the load voltage, steady current, inrush, switching frequency, power factor, and suppression method—not only the headline continuous-current rating.
Can each 1746-OW4 point use a different power source?
No. The four contacts share one common terminal, so the connected circuits must use a compatible common source and comply with grouping rules.
Why might a small electronic input not switch reliably from 1746-OW4?
The receiving circuit may draw less than the specified minimum load or be affected by contact contamination. Verify actual wetting current and interface requirements.
What should be checked if a 1746-OW4 output indicator changes but the load does not?
Measure common power and contact output, inspect the wiring arm, check the load circuit and suppression device, and assess possible worn or welded contacts.
Can 1746-OW8 replace 1746-OW4 without project changes?
Not as a drop-in assumption. The point count, terminal schedule, current grouping, chassis configuration, output image, and installed wiring all require engineering review.